best available cop



Oct. 2 1923. 1,469,381

N. J. CONRAD swrrcn Filed Feb. 24 j 192e 5 sheets-sheet 1 N. J. CONRAD SWITQH Filed Feb. 24 1920 5 Sheets-Sheet 3 Oct. 2, 1923. l 1,469,381

N. J. CONRAD y .swxTcu Filed Feb. 24, 192.0 5 sheets-sheet 4 di v Vlam

Oct. 2 1923.

' 1,469,381 N. J. CONRAD SWITCH' Fled Feb. 24. 1926 5 sheets-sheet 5 Patented Oct. 2, 1923.

UNITED STATES ENTY OFFICE.

NICHOLAS J. Corman, OF'OIIICAGO, ILLINoIsAssIGNOR rro sfnwmzmil CONRAD,

oF GHIOAG'O, ILLINOIS, A CORPORATION OF ILLINOIS.

--swrrclarl applicati@ med Febraar 24, 1920. serian Naeoos.

of thisspecification; 1.

My invention relates-to and has' for its: object the -prcvision Of ,suitable means utilized in connection With'ssgvitches or other circuit c'or'itrolling. ,o'rI ,changingele ments wherebyto causea rapid extinguishmentofthe are that meyybejormedduring the actuation of .switches oreieinents or to eliminate the are entirelyr uilde'rfceii-l tainconditions. My invention is. ofmene ,iatieular.;v utilityin connection wi asal'e. used. in vconnection `Wit vhigh 4poten?? tialacireui'tsgor ,apparat1s. f g; My- `invention" contemplat "s 'l the f use fof a suitable Huid. Fia v inrf the; necesarjxpmpcftv ries whereby man smfapcrny in., connection w't My invention of use qopnecticii with alI--Of those liquids'pr I Huids'ivhich. areof value i'nthis Iconnecrtion, suchas for instanceoil or thervariousother liquids sare' set, forth in Patent No.1;,31'9,1907i.issed Qet`;' 28,- 1919, to E.. O. VSclrireit'zer' nd. In general. my, invention contemplates `Ythe, provision of means whereby the Huid isL directed in a path acrossthe are to thereby assist in the extinguishment of S1icl1a1'c. l will explain certain forms Wbichmy invention may take morein det-ail by referring to the accompanyingr dra-Wings, in, which c F ig. l is a fragmentary view Of-af switch constructed in accordancei with my invention, certain portions being, shown in sec'- tions more clearly to reveal'features of construction; Y Y

Fig. 2 is an enlarged longitudinal sectional view of certain vent mechanism shown in Fig. l;

th suchsijiqtehe's cir-elements I 3 is a fragmentary longitudinal sectional view of a modified form of thedevice shown in connection with a `circuit breaker;l

Fig. 3" is a continuance of the lower por tion of Figr; l Figo/1 is a view similar to Fig. 3a shot;Y` mg the movableN parts in an intermediate positlon;4

Fig, 5 is a. fragmentary, longitudinal 'seff tional VView ,ofa modified forni of switch rechani'sm; f l y f, A 'i Figs. 6 and 7 are similar yews 'ofririodfv cordance ywith Iny invention Eef 8 is a frenesia@ verticalpeff'ofytr ajtlng contact '5 mei'nlirsi vieiz of the cooper of the switch inechnisxnshowil in F i`g'.?f., A Referrng more particularlyto -Ii-ig,t I I s how, @switch iyhose fa'rtsylare suitably mougnt'e'd up'oiiyabase' p p ate, is rigidly secured orjsimilar siipjgort11. T

to a

he syitcli comsiii ciipsfimay: be of customary designfaifd are contacts 18, and auxiliary break contacts 19. c These arein electrical, eonneg';tionA lwith the metallic plate20 which in turn is in electrical connection with tliebindirig'post or connectors 21.; The movable element of the yswitch consists of the hollovvprod 22. This hollow rod es readily apparentl from an inspection of Fig. y1 is in its circuit closing position. VVlienevei' itis desired Vto interrupt the circuit then thdtiibe is pulled upwardly through the agencyof the 'support or bridge 23 controllablewby the linl( 24. t will of course be understood that the bridge 23 supports. two rods 22 sothat the switch as herein diselpsedvbreaksbothsides of the metallic circuit. The tube 22 passes outwardly fromthecup I" throu'ghthe in* sulating sleeve 25,11 suite le gasket'26being Provided. SO .that 'the Cup is always 'm f curs which under normal a closed condition. The upper extremity of the tulle surment-.ted hy n (-:ip structure 27 within which a disc 28 is loosely,1 mounted. This dise 23 is permanently held in place wthin. "th'e Y'capstructure and normally closes the'iipper extremity o'f the tube 22.

Upon :i predetermined increase of the pressure-within the cup 13 lthevent is lifted f so as to permit escape of the -gases which here been formed after the switch has been opened i 1?.

From @hat has been thus described it will be apparent that the"liq'uidfwithin 'the cup 13 has no means of escape n orihavee cessg'gises any mcgins of escape eupe'xcptthrou'gh thel't'ube' 2 2 whichf'in vbeing' ifm 0f Ythe extremity 1 Of the tube 22 'to"eithe r"the main onnngtizliary switch .contacts 18 .and 1 9. The

opening, of Atlie lcircuitbrings bout :in inf crease'of`pres'sure Within the c up 13 nd 4as this pressure mustv find; egress somewhere .it 11b-weaning' the path if 1e-si .resistance which, is '1i"iYia. l -'d ly" h rough' the tube 2 2 and Aoutwa lypst Ithefd' y circuitbreake'r consisting of the container 2 9 i., plate 32 through suitablyheld place bythesupport 130 and in tl'rn'suppoi-ting the controlling "coil 3 1 with lits'asso'cintetl' cat-ch' :ind: operating pzirtsf which projects 'the tube 33. This tube' 33'agnin serves as one ofthe main su'iteh'clements. The .tube 33 hnspreferahly three holes which'iilels'o arranged that when the tube 3 3 isdi'a'wnupiviirdly under the influence4v offthe spring 35 ,these holes eventura'lly provideV an outlet for'the ex'cess presas'th'ese holes after a tube 33 will be found the esp plate The spn'g is securely fastened et its upper extremityto the block 36 'and is x'edly se cil'iedfto the block 37 :block 37`is Ifuiedly"I'noilnt/ed' upon the warmest@ i through' efficacy of the menusV to oivgaway from-the eicing'a'reaby.

The ieontniuei'fis closed by the cup .2t itsflorr. extremity.,

lower extremity of the tube 33. The tube 33 also carries fixedly mounted contact fingers or elements 38 as shown more clearly in Figs, 3 and 4. These contact fingers cooperetefbwith 'ai stationery Contact; #39 rigidly' securedwithin thecontin'ef- 29;V- The contact 39 is in engagement with the metallic cap .4.29 .through `the agencyefs which contest isheg-gvvith the circuit which it is desired to protect.

excess pressure must again find its outlet thend through the lvent holes 34 after these vent holes lm ve `risen above the cap lete`3`2.`l'1 "lie vetholes'rise This deeriti? moves upvtqrdly 'iiith'fthe tube' and by reason of tsA inclined iihi`z Tice Seite@ direqt thsiifudihfis'gh sich ii.. ispa'ssing. scros's the iloive'r. e'tremities of the contact j 38,' A 'suitble cord `:4,3 i

as, ivellninderstod is used ijest'ore, theA f'ciif ities of whichE extend outwardly from he tsnkor:container fndwhich at their upper extremities" im, provided with cap plot/es' '23 siinilzir to 'that shoivninfcoiinection'v'litli 1. will be noted that :is thef'switch' is being'openedt'hat the excess pressure lnust aga'in tindfeg'ress aginst the tubes 52i1nd`53so thst the "are extinguishing liqlidf or '{luid trvei's' across the p ithrofgthe InFig. 6A l.Tsliow 'a somewhat modified form 'of'structure in -which -the 'link ljis aga. i11 mova,ble to control the movable tontects V this instance include main contacts '5 4 su .t5-and @urinary comme 56 and 57. "j Co-lopemting main contacts 'are shovvn at 58 and 59 respectively and 'co-operating auxiliary or urcingicontacts are shox/n' at 6() and l61 respectively; It will be noted that the -co-operetizg 'euii'iliary contects ere carried by non-conducting tubes '62 and' As the container 29 is 7 'l'elosed it will be noted that the formation of 'Massenet waits agaiaarsspraaasa-eahmais 'Seile pieta alaaf aie restauri seated setween .t contctese and eggofthe canards 57 and' "61." Byr/a'soi df e fact that the container is again closed and that egress for excess pressure must be through the tubes 62 and 63, it will be seen that the are extinguishing liquid or Huid is again forced in a path across the are.

In Fig. 7 I show a further modified form of structure in which suitable switch contacts 64 and 65 are provided which co-operate with contacts 66 and 67 respectively. The contacts 66 and 67 are carried by a non-conducting tube 68 which tube again is provided with the cap structure 27 and venting disc 28. The bore of the tube 68 is continued in the form of a Y as shown by the dotted lines to the extremities of the movable contacts 66 and 67. As the container 65 is again closed the excess pressure must find its egress through the tube 68 and the arc extinguish` ing liquid or fluid must pass inwardly to the openings within the switch elements 66 and 67 so that this fluid again followsa path traversely of the are.

From what has thus been described the nature of my invention will be readily clear to those skillcdin the art and it will be readily clear that many modifications may be made within the scope of my invention Without departing from its salient features.

Having however thus described several forms which my invention may take what 1 claim as new and desire to secure by Letters Patent is:

1. A device of the character described comprising a normally closed container` having arc interrupting fiuid therein, a normally closed vent tube extending into said container having an open end submerged in said huid, providing the only means of communication between the interior of said container and tube, means for opening said vent to relieve excess pressure upon circuit rupture, and a pair of co-operating switch contacts, one of said switch contacts beingl mounted on said tube at the submerged open end thereof.

2. A device of the character described comprising a normally closed container han ing are interrupting fiuid therein, a rent tube extending into said container haringr an open end submerged in said fluid, pio viding the only means of communication between the interior or" said container and tube, and a pair of co-operating switch contacts, one of said switch contacts beingr mounted on said tube at the submerged open end thereof.

3. A device of the character described comprising a container having arc interbasetta' rusting asia therein, a-"pairnffswitchf coa-v tact within 'said' container,v a movable opencontacts at Atl'ieopen end-thereof', and-'a d` e Hector' carried by 'said 'tube adjacent' saidl set up at circuit rupture across the face of said switch contact.

4. A device of the character described comprising a container having arc interrupting Huid therein, a pair of switch contacts within said container, a movable tube extending outside and communicating with the exterior of said container carrying one of said switch contacts, the switch contact carried by said tube being exteriorly of the other switch contact when said switch contacts are in their circuit closing position. and a detlector carried bj said tube and surrounding the same for directing the stream of Huid moving toward the open end of said tube at circuit rupture across the face of said switch contact.

5. A device of the character described comprising a container having arc interrupting Huid therein, a pair of switch con tacts within said container, a movable tube extending outside and communicating with the exterior of said container carrying one of said switch contacts, a detleetor' carried by said tube for directing currents of said Huid across the face of said switch contact, and means for controlling the egress of fiuid from said tube.

6. A device of the character described comprising a container having are interrupting fluid therein, a pair ot' switch contacts within said container, a movable open vended tube communicating with the exteriorM of said container carrying one of said switchv contacts at the open end thereof, the switch Contact carried by said tube being exteriorly of the other switch contact when said switch contacts are in their circuit closing position, a deieetor carried by said tube for direct ing currents of said Huid set up at circuit rupture across the face of said switch contact, and means for controllingr the egress ot' Huid from said tube.

7. In a device ot' the character described, a container haringr are interrupting Huid therein, a tubular member mounted for movement within said container, and a sta tionary contact, said tubular member being open at the lower end thereof and having means adjacent said open end cooperating with said stationary contact to close the cir cuit, said tubular member having means operated by the movement thereoic to open said member to the outer air prior to separa tion ot' said contacts.

8. In a device of the character described, u container having are interrupting fiuid therein, a tubular member mounted for lwith said stationary Contact to movement within said container, and :L sta tionary Contact, Said tubular member being open at the lower end thereof and having means adjacent said open end cooperating eiose the circuit, said tubular member having means operated by the movement thereof to open said member. to the outer airpriorztoseparation of said contacts, and means for directing the currents. insaid `fluid set up by circuit rupture across said. contacts.

In witness whereoh hereunto subscribe my naine this 13th day of Feb. A. D.VJ 1920.

NICHOLAS J. CONRAD. 

